Claim Verification

What it is

Scans a draft for factual claims, then matches each to a sentence in the provided sources. Supported claims get a quote, unsupported ones are listed for removal. The rule that makes it honest is that a paraphrase is not a source — if the sentence is not there, the claim is marked unsupported.

Install

Clone the repository, then copy the skill folder into your agent's skills directory — ~/.claude/skills/ for Claude Code. Skills are plain files: no build step, no daemon.

npx skills add claim-verification

How to judge it

Read the SKILL.md before you install. A good skill states when it applies, what it must not do, and how to verify the result. A skill that only lists adjectives will change the agent's tone without improving its output — skip those.

Other research skills

• Survey Sampling Check — Check a survey's sample before trusting its percentages.
• Synthesis Matrix — Build a source-by-question matrix so synthesis keeps its evidence.
• Expert Interview Guide — Write questions that cannot be answered with a yes.